Meaning
Mechanical breakdown processes create ultra small particles during the handling, milling, or atomization of battery active materials. Excessive micro-fine generation increases the viscosity of the slurry and creates safety hazards during powder handling. These microscopic particles possess high surface energy, which causes them to stick together and form hard agglomerates.
Battery cell manufacturers track this behavior to maintain uniform slurry properties and prevent filter clogging.
Process Mechanism
High shear forces during pneumatic transport cause particles to collide and break apart. These collisions generate microscopic fragments that alter the overall particle size distribution.
Quality Risk
Small fragments increase the side reactions with the electrolyte, which accelerates gas formation in the finished cell. This behavior reduces the operational life of the battery.
Sourcing Impact
Sourcing agreements specify limits on the sub-micron fraction to minimize these risks. Material suppliers use air classification systems to remove these fine fragments before packaging.
